Sukmantoro, W. et al. 2019. Notes of Honey Buzzard and Other Birds in Dumai and Rupat Island, Riau Province, Indonesia. Biota : Jurnal Ilmiah Ilmu-Ilmu Hayati. 11, 2 (Oct. 2019), 131–133. DOI:https://doi.org/10.24002/biota.v11i2.2637.